Báo cáo hóa học: " Research Article A Real-Time Programmer’s Tour of General-Purpose L4 Microkernels"

Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài: Research Article A Real-Time Programmer’s Tour of General-Purpose L4 Microkernels | Hindawi Publishing Corporation EURASIP Journal on Embedded Systems Volume 2008 Article ID 234710 14 pages doi 2008 234710 Research Article A Real-Time Programmer s Tour of General-Purpose L4 Microkernels Sergio Ruocco Laboratorio Nomadis Dipartimento di Informatica Sistemistica e Comunicazione DISCo Universita degli Studi di Milano-Bicocca 20126 Milano Italy Correspondence should be addressed to Sergio Ruocco ruocco@ Received 20 February 2007 Revised 26 June 2007 Accepted 1 October 2007 Recommended by Alfons Crespo L4-embedded is a microkernel successfully deployed in mobile devices with soft real-time requirements. It now faces the challenges of tightly integrated systems in which user interface multimedia OS wireless protocols and even software-defined radios must run on a single CPU. In this paper we discuss the pros and cons of L4-embedded for real-time systems design focusing on the issues caused by the extreme speed optimisations it inherited from its general-purpose ancestors. Since these issues can be addressed with a minimal performance loss we conclude that overall the design of real-time systems based on L4-embedded is possible and facilitated by a number of design features unique to microkernels and the L4 family. Copyright 2008 Sergio Ruocco. This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use distribution and reproduction in any medium provided the original work is properly cited. 1. INTRODUCTION Mobile embedded systems are the most challenging front of real-time computing today. They run full-featured operating systems complex multimedia applications and multiple communication protocols at the same time. As networked systems they are exposed to security threats moreover their inexperienced users run untrusted code like games which pose both security and real-time challenges. Therefore complete isolation from untrusted applications is indispensable for user .

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